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Commitments and Contingencies (Narratives) (Details) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
May 31, 2021 USD ($) claim_filed | May 31, 2021 USD ($) claim_filed Home | Nov. 30, 2020 USD ($) | Nov. 30, 2016 USD ($)
Loss Contingencies [Line Items] |  |  |  |
Minimum warranty on electrical and other building systems (in years) |  | 2 years |  |
Maximum warranty on electrical and other building systems (in years) |  | 5 years |  |
Warranty for other components of the home (in years) |  | 1 year |  |
Performance bonds | $ 960,100,000 | $ 960,100,000 | $ 897,600,000 |
Letters of credit outstanding | 54,800,000 | $ 54,800,000 | 42,100,000 |
Warranty for other components of a home (in years) |  | 1 year |  |
Cash deposits | 67,961,000 | $ 67,961,000 | 54,634,000 |
Aggregate purchase price of land | 1,657,143,000 | $ 1,657,143,000 | 1,418,429,000 |
Damages from Product Defects [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Structural warranty provided by the company (in years) |  | 10 years |  |
Minimum number of affected homes for construction defect claims | Home |  | 2 |  |
Warranty Obligations [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Structural warranty provided by the company (in years) |  | 10 years |  |
Self Insurance [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Recoveries related to warranty and other claims | $ 65,100,000 | $ 65,100,000 | $ 60,000,000.0 |
Northern California Townhome Community [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss Contingency Accrual |  |  |  | $ 25,000,000.0
Chapter 558 of the Florida Statutes [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Outstanding noticed claims | claim_filed | 686 | 686 |  |
Maximum [Member] | Northern California Townhome Community [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Product Liability Contingency, Loss Exposure in Excess of Accrual, Best Estimate | $ 3,000,000.0 |  |  |
Minimum [Member] | Northern California Townhome Community [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Product Liability Contingency, Loss Exposure in Excess of Accrual, Best Estimate | $ 0 |  |  |

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